MIL-DTL-38999 Series I connectors are designed for rugged environments, featuring up to 128 contacts in an environmentally sealed insert. With an operating temperature range of -65 °C to 200 °C, these connectors ensure reliable performance in extreme conditions. Available in various shell sizes and insert arrangements, they offer flexibility for different applications. Constructed with high-strength aluminum shells and offering multiple plating options, including RoHS-certified finishes, these connectors meet stringent military specifications. The connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, catering to diverse mounting needs. Utilizing M39029 rear release crimp contacts, they ensure secure connections. With features like gold contact plating, bayonet coupling, and N keyway polarization, these connectors provide durability and ease of use. Suitable for harsh environments, they are ideal for applications requiring high reliability and performance.